Barack Obama made his presidential pitching debut on Tuesday at the All-Star Game in St. Louis, but not before getting a little practice and a bit of advice.

“I’m telling him, ‘Follow through,’” said Willie Mays.

BASEBALL/OBAMAThe 78-year-old Giants Hall-of-Famer traveled on Air Force One with Obama from Michigan to St. Louis, where the president threw out the first pitch.

“He’s gonna do fine, I guarantee you. He’ll be fine. I just want to make sure he follows through,” said the Say Hey Kid.

Mays was an appropriate guest for Obama to take to the game. Ted Williams once said, “They invented the All-Star Game for Willie Mays.” He played in 24 of them.